春耕大忙时节,一台新水泵刚开始工作时,水能抽到一定高度却出不来,机手急得团团转,用水户也看着抽水机怨声载道。机手反复检查都没有发现问题,无奈只得派人到农机部门找来两个技术员帮助抢修。技术员认真检查了水泵的密封装置、底阀、吸水管、主机车况以及主机与水泵的连接情况等,均没找到毛病。是不是水泵扬程不够呢?但通过计算,完全符合要求,可以抽出水。后来,经过仔细分析水泵的工作原理,才检查出是因为叶轮的锁紧螺丝没有扭紧所致。原来,水泵工作后,水由叶轮甩出,进入泵壳。此时,水的压力以相反方向同时作用于叶轮前后盖板,形成一个指向叶轮进口的轴向力。此力便叶轮和轴一起向进口方向移动,如果锁紧螺丝松动,出水 Spring busy period, a new pump just started working, the water can be drawn to a certain height, but could not get out, the hands rush anxiously turn, water users are also looking at the pump complaining. Repeated check did not find the hands of the problem, but unfortunately had sent to the farm machinery department to find two technicians to help repair. The technician conscientiously checked the seal of the pump, the bottom valve, the suction pipe, the condition of the main engine and the connection between the main engine and the pump. Is not enough pump head? But by calculation, fully meet the requirements, you can pump out the water. Later, after careful analysis of the working principle of the pump, only to check out because the impeller locking screw is not due to tightening. It turned out that after the pump work, water thrown from the impeller, into the pump casing. At this point, the water pressure in the opposite direction at the same time acting on the impeller front and rear cover, forming an impeller into the axial force. This force will impeller and shaft together to move the direction of imports, if the locking screws loose, water